What’s old is new again (and again, and again, and…):
“The children now love luxury; they have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise. Children are now tyrants, not the servants of their households. They no longer rise when elders enter the room. They contradict their parents, chatter before company, gobble up dainties at the table, cross their legs, and tyrannize their teachers.”
- Attributed to Socrates by Plato
UPDATE:
I can’t read “Socrates” without think of “Bill and Ted’s Excellent Adventure”‘s: “So-crate-s! Dude!”
[...] generation since the time of Plato, if not before, has recognized that teenagers, in general, feel their parent’s generation are [...]